Arched window covering



FIG. 1 is a side perspective view of an arched window covering showing my new design;

FIG. 2 is a front elevational view hereof;

FIG. 3 is a rear elevational view hereof;

FIG. 4 is a top view hereof;

FIG. 5 is a bottom view hereof; and,

FIG. 6 is a side view hereof. 

The ornamental design for arched window covering, as shown and described. 